【Author】
Zamir, Linir; Shaan, Aman; Nojoumian, Mehrdad
【Source】2021 IEEE 29TH INTERNATIONAL CONFERENCE ON NETWORK PROTOCOLS (ICNP 2021)
【Abstract】Consensus protocols are a key feature in decentralized systems where multiple unreliable nodes operate, e.g., in Blockchain technologies with many worldwide applications such as supply chain management, cryptocurrencies and information sharing. ISRaft is a consensus protocol built upon Raft, a previously developed protocol that is used for replicated state machines when a group of nodes is required to achieve a consensus related to the state of the machine. This paper therefore proposes an alternative version of the ISRaft consensus protocol to allow communication among nodes in a secured fashion while maintaining the security features of the original ISRaft algorithm even in the presence of adversarial nodes. The proposed model utilizes a trust parameter to enforce cooperation, i.e., a trust value is assigned to each node to prevent malicious activities over time. This is a practical solution for autonomous units with resource-constrained devices where a regular encrypted communication method can negatively affect the system performance.
【Keywords】Consensus Algorithm; Autonomous System; Blockchain Technology; Trust Model; Raft
【摘要】共识协议是分散系统中的一个关键特征，其中多个不可靠节点运行，例如，在具有许多全球应用（如供应链管理、加密货币和信息共享）的区块链技术中。 ISRaft 是建立在 Raft 之上的共识协议，Raft 是先前开发的协议，当需要一组节点来实现与机器状态相关的共识时，用于复制状态机。因此，本文提出了 ISRaft 共识协议的替代版本，以允许节点之间以安全的方式进行通信，同时即使在存在敌对节点的情况下也能保持原始 ISRaft 算法的安全特性。所提出的模型利用信任参数来强制合作，即，为每个节点分配一个信任值，以防止随着时间的推移进行恶意活动。对于具有资源受限设备的自治单元来说，这是一种实用的解决方案，其中常规加密通信方法会对系统性能产生负面影响。
【关键词】共识算法；自治系统；区块链技术；信任模型；筏
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